The cable box and stereo are in different parts of the house. There is already a coax run that I can use but the areas are finished so I can't use a differnt type of cable.
You can use the coax run as a digital coax input if your cable box has a digital coax out and your receiver has a digital coax in. Just get a F type to RCA adapter on both ends. If not, you'd need two cables to function as L and R of stereo.